American Association of State Highway and Transportation Officials, United States. Federal Highway Administration, & Barker, R. M. (1991). Manuals for the design of bridge foundations: Shallow foundations, driven piles, retaining walls and abutments, drilled shafts, estimating tolerable movements, load factor design specifications, and commentary. Transportation Research Board.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAmerican Association of State Highway and Transportation Officials, United States. Federal Highway Administration, और R. M. Barker. Manuals for the Design of Bridge Foundations: Shallow Foundations, Driven Piles, Retaining Walls and Abutments, Drilled Shafts, Estimating Tolerable Movements, Load Factor Design Specifications, and Commentary. Washington, D.C: Transportation Research Board, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAmerican Association of State Highway and Transportation Officials, et al. Manuals for the Design of Bridge Foundations: Shallow Foundations, Driven Piles, Retaining Walls and Abutments, Drilled Shafts, Estimating Tolerable Movements, Load Factor Design Specifications, and Commentary. Transportation Research Board, 1991.